Ultra-wideband antenna and device

Abstract

An ultra-wideband antenna and a device are provided. A main radiation unit ( 2 ) and a microstrip line feed unit ( 3 ) of the ultra-wideband antenna are provided on the front surface of a dielectric substrate ( 1 ), and the microstrip line feed unit ( 3 ) is electrically connected to the main radiation unit ( 2 ). A grounding plate ( 4 ) is provided on the back surface of the dielectric substrate ( 1 ) opposite to the front surface, and at least a part of a feed unit ( 15 ) is extended from a preset location to a terminal end ( 6 ) of the microstrip line feed unit ( 3 ) or a tail part ( 16 ) of the grounding plate ( 4 ).

What is claimed is: 
     
         1 . An ultra-wideband antenna, comprising:
 a dielectric substrate ( 1 );   a main radiation unit ( 2 ); and   a feed unit ( 15 ), wherein the feed unit ( 15 ) comprises a microstrip line feed unit ( 3 ) and a grounding plate ( 4 );   wherein the dielectric substrate ( 1 ) comprises a front surface and a back surface opposite to each other;   wherein the main radiation unit ( 2 ) and the microstrip line feed unit ( 3 ) are arranged on the front surface, the microstrip line feed unit ( 3 ) being electrically connected to the main radiation unit ( 2 ), and the grounding plate ( 4 ) is arranged on the back surface;   wherein at least a part of the feed unit ( 15 ) is configured to expand from a preset location to a terminal end ( 6 ) of the microstrip line feed unit ( 3 ) or a tail part ( 16 ) of the grounding plate ( 4 );   wherein the preset location comprises a first location ( 8 ) on the grounding plate ( 4 ), and the grounding plate ( 4 ) is configured to gradually expand from the first location ( 8 ) to the tail part ( 16 ) of the grounding plate;   in a projection region of the grounding plate ( 4 ) on the front surface, projections of contour lines from the first location ( 8 ) to two ends of the tail part ( 16 ) of the grounding plate are a first curve ( 17 ) and a second curve ( 18 ) respectively, openings of the first curve ( 17 ) and the second curve ( 18 ) face toward the tail part ( 16 ) of the grounding plate ( 4 ), and the first curve ( 17 ) and the second curve ( 18 ) are bent towards a direction away from the tail part ( 16 ) of the grounding plate ( 4 ).   
     
     
         2 . The ultra-wideband antenna according to  claim 1 , wherein the first location ( 8 ) is within a projection region, on the back surface, of a preset length of the microstrip line feed unit ( 3 ) in a direction from an initial end ( 5 ) of the microstrip line feed unit to the terminal end ( 6 ), and the preset length comprises one third of a length of the microstrip line feed unit. 
     
     
         3 . The ultra-wideband antenna according to  claim 1 , wherein a projection of an axis ( 9 ) of the grounding plate on the front surface is in a region where the microstrip line feed unit ( 3 ) is located. 
     
     
         4 . The ultra-wideband antenna according to  claim 1 , wherein the main radiation unit ( 2 ) comprises an annulus main radiation unit. 
     
     
         5 . The ultra-wideband antenna according to  claim 1 , wherein the microstrip line feed unit ( 3 ) comprises a first feed-in part ( 10 ) and a second feed-in part ( 11 ); an initial end ( 5 ) of the first feed-in part ( 10 ) is electrically connected to the main radiation unit ( 2 ); a first connection end of the first feed-in part ( 10 ) is electrically connected to a second connection end of the second feed-in part ( 11 ); the preset location comprises the second connection end;
 wherein the second feed-in part ( 11 ) is configured to expand from the second connection end to the terminal end ( 6 ).   
     
     
         6 . The ultra-wideband antenna according to  claim 5 , wherein a projection of an axis ( 9 ) of the grounding plate on the front surface coincides with a projection of an axis of the microstrip line feed unit ( 3 ) on the front surface. 
     
     
         7 . The ultra-wideband antenna according to  claim 1 , wherein at least one of two curves of projections of contour lines from the first location ( 8 ) to two sides of a bottom ( 7 ) in a projection of the grounding plate ( 4 ) on the front surface, includes at least two different curvatures. 
     
     
         8 . A device comprising an ultra-wideband antenna, wherein the ultra-wideband antenna comprises:
 a dielectric substrate ( 1 );   a main radiation unit ( 2 ); and   a feed unit ( 15 ), wherein the feed unit ( 15 ) comprises a microstrip line feed unit ( 3 ) and a grounding plate ( 4 );   wherein the dielectric substrate ( 1 ) comprises a front surface and a back surface opposite to each other;   wherein the main radiation unit ( 2 ) and the microstrip line feed unit ( 3 ) are arranged on the front surface, the microstrip line feed unit ( 3 ) being electrically connected to the main radiation unit ( 2 ), and the grounding plate ( 4 ) is arranged on the back surface;   wherein at least a part of the feed unit ( 15 ) is configured to expand from a preset location to a terminal end ( 6 ) of the microstrip line feed unit ( 3 ) or a tail part ( 16 ) of the grounding plate ( 4 );   wherein the preset location comprises a first location ( 8 ) on the grounding plate ( 4 ), and the grounding plate ( 4 ) is configured to gradually expand from the first location ( 8 ) to the tail part ( 16 ) of the grounding plate;   in a projection region of the grounding plate ( 4 ) on the front surface, projections of contour lines from the first location ( 8 ) to two ends of the tail part ( 16 ) of the grounding plate are a first curve ( 17 ) and a second curve ( 18 ) respectively, openings of the first curve ( 17 ) and the second curve ( 18 ) face toward the tail part ( 16 ) of the grounding plate ( 4 ), and the first curve ( 17 ) and the second curve ( 18 ) are bent towards a direction away from the tail part ( 16 ) of the grounding plate ( 4 ).   
     
     
         9 . The device according to  claim 8 , wherein the first location ( 8 ) is within a projection region, on the back surface, of a preset length of the microstrip line feed unit ( 3 ) in a direction from an initial end ( 5 ) of the microstrip line feed unit to the terminal end ( 6 ), and the preset length comprises one third of a length of the microstrip line feed unit. 
     
     
         10 . The device according to  claim 8 , wherein a projection of an axis ( 9 ) of the grounding plate on the front surface is in a region where the microstrip line feed unit ( 3 ) is located. 
     
     
         11 . The device according to  claim 8 , wherein the main radiation unit ( 2 ) comprises an annulus main radiation unit. 
     
     
         12 . The device according to  claim 8 , wherein the microstrip line feed unit ( 3 ) comprises a first feed-in part ( 10 ) and a second feed-in part ( 11 ); an initial end ( 5 ) of the first feed-in part ( 10 ) is electrically connected to the main radiation unit ( 2 ); a first connection end of the first feed-in part ( 10 ) is electrically connected to a second connection end of the second feed-in part ( 11 ); the preset location comprises the second connection end;
 wherein the second feed-in part ( 11 ) is configured to expand from the second connection end to the terminal end ( 6 ).   
     
     
         13 . The device according to  claim 12 , wherein a projection of an axis ( 9 ) of the grounding plate on the front surface coincides with a projection of an axis of the microstrip line feed unit ( 3 ) on the front surface. 
     
     
         14 . The device according to  claim 8 , wherein at least one of two curves of projections of contour lines from the first location ( 8 ) to two sides of a bottom ( 7 ) in a projection of the grounding plate ( 4 ) on the front surface, includes at least two different curvatures.